B-pillarless Sliding Door Reinforcement Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
B-pillarless opposite sliding doors face a deterioration in rigidity and roof crush resistance during broadside collisions due to the absence of a B pillar, leading to increased costs and complexity in supporting structures.
Innovation Solution
A rigidity reinforcing structure is implemented, featuring a vertically mounted column impact beam, a horizontally mounted center rail, and a lower impact beam that intersect to provide two-point support, enhancing the door's up-down and front-rear direction stability, with additional components like upper and lower brackets and an internal belt rail to reinforce the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a B pillar is omitted to enable opposite sliding doors, then the door can slide freely, but the rigidity and roof crush resistance deteriorate in broadside collisions
Solution Approach 1:
The patent merges the impact beam and center rail into a single integrated component. The impact beam serves dual functions: absorbing collision energy horizontally and providing vertical support through its connection to the center rail, eliminating the need for a separate B pillar while maintaining both sliding functionality and structural strength
Solution Approach 2:
The impact beam is designed to perform multiple functions simultaneously: it acts as a collision energy absorber, a vertical support structure, and a sliding guide component. This multi-functionality compensates for the omitted B pillar by consolidating its support roles into the impact beam-center rail integration
2Ease of operation
If the door is supported at two points with roller and lower rail, then the door can slide, but the bending stiffness deteriorates
Solution Approach 1:
The patent adds a vertical dimension to the support structure by having the impact beam extend vertically and connect to the center rail. This creates a three-dimensional support framework rather than simple two-point support, significantly improving bending stiffness while maintaining sliding capability through the center rail
3Strength
If additional supporting components are added to improve rigidity, then the collision resistance improves, but the number of components and costs increase
Solution Approach 1:
The patent reduces component count by merging the impact beam and center rail into one integrated piece. This eliminates the need for separate B pillar components and multiple connection brackets, reducing both the number of parts and assembly complexity while maintaining enhanced collision resistance through the integrated structure
Data Source
AI summary
A rigidity reinforcing structure for B-pillarless opposite sliding doors may include a column impact beam which is vertically mounted at one side of the door to support the door in an up-down direction of a vehicle; a center rail which is horizontally mounted at a center portion of the door to support the door in a front-rear direction of the vehicle and allows the door to slide; and a lower impact beam which is horizontally mounted at a lower side of the door to support the door in the front-rear rear direction and has one end portion where an intersection portion between the lower impact beam and the column impact beam is formed.